Optimizing Low-Load Efficiency in DC-DC Converters
Here’s PatSnap Eureka !
Summary
Problems
Existing step-down DC-DC switching converters face inefficiencies in power management and energy saving, particularly under low load conditions, due to limitations in managing a broad range of output voltage levels and risk of damaging control circuit components.
Innovation solutions
The implementation of two discrimination thresholds for the output voltage, generating control signals to selectively enable or disable linear regulators and a connection device, defining three operation regions to optimize power supply configuration and reduce power absorption.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the internal linear voltage regulator is connected to the output voltage node to reduce power absorption, then power consumption is reduced, but the solution is only applicable when output voltage is compatible with the maximum supply voltage of internal circuitry
Why choose this principle:
The patent divides the voltage regulation function into two separate linear regulators (LDO1 and LDO2) with different voltage compatibility ranges. LDO1 is designed for lower output voltage ranges while LDO2 handles higher output voltage ranges. This segmentation allows each regulator to be optimized for its specific voltage range, expanding the overall applicability of the power management system across different output voltage levels while maintaining low power consumption in each operating region.
Principle concept:
If the linear voltage regulator absorbs power in every functioning condition to regulate supply voltage, then voltage regulation is maintained, but energy-saving opportunity is lost
Why choose this principle:
The patent implements dynamic switching between different linear regulators based on the output voltage level. The system actively monitors the output voltage and selectively enables either LDO1 or LDO2 depending on which regulator is appropriate for the current operating conditions. This dynamic approach allows the system to maintain reliable voltage regulation while minimizing power consumption by using only the necessary regulator in each condition, rather than continuously absorbing power through a single regulator in all conditions.
Application Domain
Data Source
AI summary:
The implementation of two discrimination thresholds for the output voltage, generating control signals to selectively enable or disable linear regulators and a connection device, defining three operation regions to optimize power supply configuration and reduce power absorption.
Abstract
Powering the internal circuitry, that is the controller of the power switch of a step-down DC-DC converter for a broad range of values of output voltage and achieving an enhanced energy saving in a low load conditions of operation is made possible by a method and implementing circuit based on defining two distinct thresholds of discrimination of the output voltage, both tied to a reference voltage, for generating two respective control signals and defining, from logical combinations of said two control signals, three distinct regions of operation of the converter upon the varying of electrical parameters, respectively identified by logical combinations of a pair of enabling signals.